（1）_________percent of the students eat vegetables every day.
A.Fifty
B.Thirty
C.Seventy
（2）Almost all the students eat junk food _________ a week.
A.once or twice
B.three or four times
C.four or five times
（3）Only a few students drink coffee when _________
A.they want to sleep in class
B.they exercise in the P.E class
C.their parents ask them to do so
（4）The students don't use the Internet to ___________
A.watch sports
B.play games
C.read news